Stonestreet Stables, who campaigned 2009 Horse of the Year Rachel Alexandra, obtained another member of her family on Wednesday, going to $700,000 to secure a full sister to their champion mare during the second session of the Keeneland November sale.

Consigned by Gainesway on behalf of the Dolphus Morrison dispersal, Samantha Nicole is out of the stakes winning mare Lotta Kim and by Medaglia d’Oro. The yearling filly sports her famed sister’s good looks but has been diagnosed with sesamoiditis, an inflammation within the sesamoid bones.

“She’s got a little sesamoiditis…obviously it would put me off too a little bit if I wasn’t so familiar with her full sister,” said Stonestreet owner Barbara Banke. “We’re trying to build families in the breeding operation and it’s hard to get those great pedigrees. So I’m excited.”

Bred and originally campaigned by Morrison, Rachel Alexandra was a perfect 8-for-8 during her championship 2009 season, besting males three times along the way. The bay daughter of Medaglia d’Oro scored a record-setting 20 1/4 length triumph in the Kentucky Oaks and then came back 11 days later to become the first filly in more than 80 years to win the Preakness when she held off Derby winner Mine That Bird by a length.

Rachel Alexandra also toppled males in the Grade I Haskell Invitational and became the first filly to beat older males in the Grade I Woodward Stakes to cap off her historic season.

“It’s like a family member. How do you let that one go?,” John Moynihan, agent for Stonestreet, said of Samantha Nicole. “We’ll give her a shot at the racetrack. We’ll keep her here for a while, get her broken. Barbara won’t decide (which trainer she’ll go to) until next year. I thought that was a fair price.”

Alicia Wincze Hughes is the turf writer for the Lexington Herald-Leader. She started riding at age 8 and was a four-year member of the Pace University equestrian team.